We had a golden retriever who didn't want to sleep inside when he was little, so he ended up being mostly an outdoor dog. He was on a pretty long cable run and had one of those igloo style dog houses.
One evening after it was dark I went out to love on him and put more water out. Right as I turned back to the house a Barred Owl was gliding right over me . He had a good 4.5 ft wingspan, and nary a sound as he went past. To say the least, it startled me.
We rarely saw them, but heard them often in the summer.